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V400 Series VoIP Gateway User Guide
YML832 Rev1
STUN Inquiry
Using “STUN Inquiry” to detect your IP sharing device’s NAT type and communication between STUN
server and client (build-in V400 series gateway).
NOTE:
If detected NAT type is “Symmetric NAT”, then the gateway is not able
to traverse the NAT of your Internet sharing devices. This is not a flaw of the
gateway’s design, but nature of STUN protocol design.
